主要看你个人的感受。坛里的男大侠们的车可能会last 4 ever。你的宏达10万多mi，好像小有问题。老美平均新车开72个月。

In general, however, people don't really keep their cars forever. Research by R.L. Polk says that the average age of a modern vehicle is 11.4 years, while the average length of time drivers keep a new vehicle is 71.4 months -- around 6 years.